JP5495803B2 - NC cutting line for flat steel - Google Patents

Description

  The present invention relates to a flat steel NC cutting line used for a hull structure of a new ship.

  In general, the cutting work of flat steel used as part of the hull structure of a new ship is as follows: "Material import" → "Drawing cutting dimension reading" → "Handwriting marking work on material" → "Cutting work with semi-automatic cutting machine" ”→“ Cutting material removal ”is a manual operation and requires skill, so it is the most inefficient line among all production lines. It accounted for a large percentage (about 60%) of the processing time.

  Conventionally, it is well known to automatically cut a steel plate or an angle material using an NC (plasma) cutting machine (see Patent Document 1). However, since the flat steel is cut in a free state on a flat conveyor, there is a problem that the cutting accuracy cannot be ensured because the material shifts under the thermal influence received during cutting. .

JP-A-6-304839 (page 8-10, FIG. 3, FIG. 4)

  Therefore, conventionally, in order to ensure the cutting accuracy, the work of fixing the material with a restraining jig is performed every time the flat bar is cut. For this reason, there is a problem that productivity is poor and the merit of introducing an NC (plasma) cutting machine cannot be obtained.

  Accordingly, an object of the present invention is to provide a flat steel NC cutting line which can ensure cutting accuracy without reducing productivity in an NC cutting machine and can effectively achieve automation of the entire line. And

An NC cutting line for flat steel according to the present invention for achieving such an object is as follows:
A carry-in stage for distributing flat steel one by one on the first conveyor;
A cutting stage for cutting the flat steel on the second conveyor transferred from the first conveyor with an NC cutting machine;
In the NC cutting line of flat steel provided with a carry-out stage for carrying out the cut flat steel from the second conveyor,
The first conveyer and the second conveyer are provided with a conveying surface inclined to one side by an angle at which the distribution material and the transferred flat steel slide sideways, and a flat steel that skids to the lower edge of the conveying surface. equipped with a flat steel received to receive,
The carry-in stage includes a preparation conveyor provided with a plurality of flat steels adjacent to the first conveyor, and a pit provided between the first conveyor and the preparation conveyor so as to face each other. A plurality of transport carts capable of moving in and out and reciprocating, and the transport carts can be moved up and down on the base and tilted at substantially the same angle as the transport surfaces of the first conveyor and the second conveyor. It has a support surface with a steel support, and after a flat bar is distributed above the support surface in the pit of the preparation conveyor, the support surface rises and tilts when the flat bar is supported. Is supported in an inclined state, moved into the pit of the first conveyor in that state, and then returned to a flat state after distributing flat steel to the inclined conveying surface of the first conveyor when descending. Features.

Also,
The support surface of the transport carriage is supported by a swingable pin with respect to the base, and when the flat bar is not distributed, it keeps a flat state, while the distributed flat bar begins to slide by its own weight. It is characterized by tilting.

Also,
The unloading stage is cut by turning on the magnet in a state where one wire of the lifting device is suspended longer than the other wire so that the magnet is disposed along the inclined surface of the cut flat steel on the second conveyor. The flat steel is suspended, and then one wire is lifted earlier than the other wire, and when it reaches the same length as the other wire, the lifting tool is moved laterally and then lowered, and a flat conveyance surface adjacent to the second conveyor is provided. The pick-up crane which carries out the flat bar | burr cut | disconnected by turning OFF a magnet to the unloading conveyor is characterized.

Also,
The carry-in stage, the cutting stage, and the carry-out stage are provided with a plurality of flat bar detection sensors for detecting the presence or absence of flat bar, and various conveyors in the respective stages according to detection signals from these flat bar detection sensors, Control means for controlling the operation of various devices such as a transport carriage, NC cutting machine, and picking crane is provided.

  According to the flat steel NC cutting line according to the present invention, in the first conveyor and the second conveyor, the flat steel is placed on the inclined conveyance surface, and the flat steel can be fixed by its own weight. It is possible to prevent material deviation (flat steel deviation) during cutting by the NC cutting machine without using a restraining jig or the like.

  As a result, the effect of introducing the NC cutting machine, which is an automatic cutting machine, can be fully exhibited, cutting accuracy can be ensured without lowering productivity, and automation of the entire line can be effectively achieved.

It is a top view which shows the whole structure of the NC cutting line of the flat steel which shows one Example of this invention. It is operation | movement explanatory drawing of a conveyance trolley. It is a principal part top view of a carrying-in stage. It is operation | movement explanatory drawing of a picking crane.

  Hereinafter, a flat steel NC cutting line according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a plan view showing the overall configuration of a flat steel NC cutting line according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of a transport carriage, FIG. 3 is a plan view of the main part of a carry-in stage, and FIG. It is operation | movement explanatory drawing of a crane.

  In FIG. 1, S <b> 1 is a loading stage for distributing flat steel (material Wa) to be cut onto a preparation roller conveyor (first conveyor) 10, and S <b> 2 is a slat conveyor (first stage) transferred from the preparation roller conveyor 10. (2 conveyor) 20 is a cutting stage for cutting the material Wa on the NC plasma cutting machine (NC cutting machine) 30, and S 3 is a carry-out stage for carrying out the cut flat steel (cutting material Wb) from the slat conveyor 20. .

  The carry-in stage S1 includes a preparation conveyor (consisting of a roller conveyor or the like) 11 on which a plurality of (six in the figure) materials Wa are distributed adjacent to the preparation roller conveyor 10 and the preparation roller conveyor 10. And a plurality of conveyor carts 12 (seven in the figure) that can reciprocate between the conveyor 11 and the preparation conveyor 11.

  As shown in FIGS. 2 and 3, the preparation roller conveyor 10 includes rollers 10a each having a conveying surface inclined to one side (the preparation conveyor 11 side) by an angle at which the distributed material Wa slides sideways. Is mounted with an inclination of 30 degrees, and a flat steel receiver (not shown) for receiving the side sliding material Wa is provided between the rollers 10a at the lower edge of the conveying surface.

  The transport carriage 12 enters and exits pits 10b and 11a provided in a number corresponding to the carriage at positions where the preparation roller conveyor 10 and the preparation conveyor 11 face each other. Specifically, it can be self-propelled on the pair of rails 13 (see FIG. 3).

  The transport carriage 12 has a support base (support surface) 15 with a flat steel receiver 15a on which the material Wa is placed with respect to the base 14, and is supported so as to be swingable by a pin or the like offset to one side. When the material Wa is not distributed, the flat state is maintained, while the distributed material Wa begins to slide by its own weight, so that the material Wa is inclined.

  More specifically, a support base 15 that can be moved up and down by a lift cylinder (not shown) on the base 14 and can be inclined at substantially the same angle as the transport surface of the preparation roller conveyor 10 is provided in the pit 11 a of the preparation conveyor 11. After a single material Wa is distributed above the support table 15, the support table 15 is raised (see step I in FIG. 2), and the material Wa is inclined when the material Wa is supported. 2 (see step II in FIG. 2), in that state, moves into the pit 10b of the preparation roller conveyor 10 (see step III in FIG. 2), and then descends (see step IV in FIG. 2). After the material is distributed to each of the inclined rollers 10a (conveying surface) of the preparation roller conveyor 10, it returns to a flat state (see step V in FIG. 2). Step VI in FIG. 2 is a step in which the transport carriage 12 returns empty from the pit 10 b of the preparation roller conveyor 10 to the pit 11 a of the preparation conveyor 11.

  In addition, a printing device 17 that prints (marks) a product number and a cutting position is disposed on the carry-in stage S1 at the front end of the preparation roller conveyor 10. A 15-ton traverser 18 is disposed on the opposite side of the preparation roller conveyor 10 from the preparation conveyor 11.

  In the cutting stage S2, the NC plasma cutting machine 30 moves on the pair of tracks 21 laid on both sides of the slat conveyor 20 in the direction of the arrow in FIG. 1, and the material Wa has a predetermined length along the marking. Can be cut into

  Each slat conveyor 20 is provided with a transport surface inclined to one side by an angle at which the material Wa transferred from the preparation roller conveyor 10 slides sideways, like the preparation roller conveyor 10 described above. For example, a flat steel receiver 20a (see FIG. 4) that receives the material Wa and the cutting material Wb that slide sideways is provided between the casing members and the like, which is attached with an inclination of 30 degrees and that is provided on the lower edge of the conveying surface. . In FIG. 1, 22 is a dust collector, and 23A is a front-side slat conveyor having a flat conveying surface and wider than the slat conveyor 20.

  The carry-out stage S3 is provided with a rear slat conveyor 23B having a flat conveying surface adjacent to the slat conveyor 20 and wider than the slat conveyor 20, and picks a plurality of cutting materials Wb on the slat conveyor 20 by picking cranes 40 is carried out onto the slat conveyor 23B all at once. In FIG. 1, 48 is a pit and 49 is a steel / flat steel sorting base.

  As shown in FIG. 4, the picking crane 40 has magnets 41 attached in two rows in the longitudinal direction of the hanger 42, and when the cutting material Wb is carried out, the magnet 41 is first attached to the slat conveyor 20. The flat steel cut by the magnet being turned on is suspended with one wire 43b of the hanger 42 being suspended longer than the other wire 43a so as to be disposed along the inclined surface of the upper cutting material Wb ( (See Step I → Step II in FIG. 4).

  Thereafter, the one wire 43b is lifted earlier than the other wire 43a (see step III in FIG. 4), and when the length becomes the same as the other wire 43a, the hanger 42 is moved laterally (see step IV in FIG. 4). Next, the hanger 42 is lowered (see step V in FIG. 4), and the magnet 41 is turned off to carry out the cutting material Wb to the slat conveyor 23B having a flat conveyance surface adjacent to the slat conveyor 20 (FIG. 4). (See Step VI in the above). Thereafter, the lifting tool 42 is lifted (see step VII in FIG. 4) and moved laterally (see step VIII in FIG. 4).

  In this embodiment, the carry-in stage S1, the cutting stage S2, and the carry-out stage S3 are provided with a plurality of flat bar detecting sensors K1 to K9 for detecting the presence or absence of the material Wa and the cutting material Wb. According to the detection signals from the steel detection sensors K1 to K9, the various conveyors 10, 11, 20, 23A, 23B, the transport carriage 12, the NC plasma cutting machine 30, the picking crane 40, etc. in each of the stages S1, S2, S3. Control means such as a microcomputer for controlling the operation of various devices is provided in the control chamber 50.

  That is, the control means first confirms that the flat bar detection sensors K1 and K2 on the preparation conveyor 11 in the carry-in stage S1 are “material present” and the flat bar detection sensor K3 on the preparation roller conveyor 10 indicates “no material”. After confirmation, the transport carriage 12 is moved sideways (refer to the description of FIG. 2 above for the operation of the transport carriage 12). Next, when the flat bar detection sensor K3 confirms “there is a material”, the preparation roller conveyor 10 is moved. Next, when the flat bar detection sensor K4 on the preparation conveyor 11 confirms that “there is a material”, the preparation roller conveyor 10 is decelerated. Next, when the flat bar detection sensor K5 on the preparation conveyor 11 confirms that “there is a material”, the preparation roller conveyor 10 is stopped, and the printer 17 is received upon receiving a printer preparation completion signal from the stop signal of the flat bar detection sensor K5. While operating, the slat conveyor 20 in the cutting stage S2 is moved.

  Next, when the flat bar detection sensor K6 located on both sides of the slat conveyor 20 in the cutting stage S2 confirms “there is a material”, the slat conveyor 20 is stopped and the NC plasma cutting machine 30 is operated. Next, the slat conveyor 20 is moved in response to a cutting completion signal from the NC plasma cutting machine 30.

  Next, when the flat bar detection sensor K7 located on both sides of the slat conveyor 20 in the carry-out stage S3 confirms that “cutting material is present”, a stop command is issued to the slat conveyor 20, and one side of the slat conveyor 20 under deceleration When the flat bar detection sensor K8 positioned at the position confirms that “cutting material is present”, the picking crane 40 is moved (refer to the description of FIG. 4 described above for the operation of the picking crane 40). The flat bar detection sensor K9 located immediately before the slat conveyor 20 is an overrun prevention detection sensor.

  In this way, according to the flat steel NC cutting line according to the present embodiment, in the preparation roller conveyor 10 and the slat conveyor 20, the material Wa and the cutting material Wb are placed on the inclined conveyance surface, and the material Wa is caused by its own weight. Since the cutting material Wb can be fixed, it is possible to prevent the material deviation (flat steel deviation) during cutting by the NC plasma cutting machine 30 without using a restraining jig or the like.

  As a result, the introduction effect of the NC plasma cutting machine 30, which is an automatic cutting machine, can be fully exhibited, cutting accuracy can be ensured without reducing productivity, and the entire line can be effectively automated. .

Further, by using the above-described transport carriage 12, for example, the material Wa can be distributed one by one on the preparation roller conveyor 10 inclined at 30 degrees, for example, so-called automatic carry-in apparatus can be easily achieved. Further, since the transport carriage 12 can be compactly accommodated in a narrow space between the preparation conveyor 11 and the preparation roller conveyor 10, it is effective in terms of layout.

  Further, by using the above-described picking crane 40, for example, all the cutting materials Wb on the slat conveyor 20 inclined at 30 degrees can be carried out at a time, so that a so-called automatic carry-out device can be easily achieved.

  Needless to say, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. For example, a general NC gas cutting machine or NC laser cutting machine may be used as the NC cutting machine instead of the NC plasma cutting machine. Moreover, you may use the thing of another structure in a conveyance trolley | bogie or a picking crane.

  The flat steel NC cutting line according to the present invention is preferably used for a flat steel cutting line which is a part of a hull structure of a new ship.

DESCRIPTION OF SYMBOLS 10 Preparation roller conveyor 10a Roller 10b Pit 11 Preparation conveyor 11a Pit 12 Carriage carriage 13 A pair of rails 14 Base 15 Support stand 15a Flat steel receptacle 17 Printing device 18 15 ton traverser 20 Slat conveyor 20a Flat steel receptacle 22 Dust collector 23A Pre-stage side slat Conveyor 23B Rear slat conveyor 30 NC plasma cutting machine 40 Picking crane 41 Magnet 42 Lifting tool 43a Other wire 43b One wire 50 Control room S1 Loading stage S2 Cutting stage S3 Unloading stage K1 to K9 Flat steel detection sensor Wa Material Wb Cutting material

Claims (4)

A carry-in stage for distributing flat steel one by one on the first conveyor;
A cutting stage for cutting the flat steel on the second conveyor transferred from the first conveyor with an NC cutting machine;
In the NC cutting line of flat steel provided with a carry-out stage for carrying out the cut flat steel from the second conveyor,
The first conveyer and the second conveyer are provided with a conveying surface inclined to one side by an angle at which the distribution material and the transferred flat steel slide sideways, and a flat steel that skids to the lower edge of the conveying surface. equipped with a flat steel received to receive,
The carry-in stage includes a preparation conveyor provided with a plurality of flat steels adjacent to the first conveyor, and a pit provided between the first conveyor and the preparation conveyor so as to face each other. A plurality of transport carts capable of moving in and out and reciprocating, and the transport carts can be moved up and down on the base and tilted at substantially the same angle as the transport surfaces of the first conveyor and the second conveyor. It has a support surface with a steel support, and after a flat bar is distributed above the support surface in the pit of the preparation conveyor, the support surface rises and tilts when the flat bar is supported. Is supported in an inclined state, moved into the pit of the first conveyor in that state, and then returned to a flat state after distributing flat steel to the inclined conveying surface of the first conveyor when descending. A flat steel NC cutting line. The support surface of the transport carriage is supported by a swingable pin with respect to the base, and when the flat bar is not distributed, it keeps a flat state, while the distributed flat bar begins to slide by its own weight. The flat steel NC cutting line according to claim 1 , wherein the NC cutting line is inclined. The unloading stage is cut by turning on the magnet in a state where one wire of the lifting device is suspended longer than the other wire so that the magnet is disposed along the inclined surface of the cut flat steel on the second conveyor. The flat steel is suspended, and then one wire is lifted earlier than the other wire, and when it reaches the same length as the other wire, the lifting tool is moved laterally and then lowered, and a flat conveyance surface adjacent to the second conveyor is provided. The flat cutting NC cutting line according to claim 1 or 2 , further comprising: a picking crane for turning off the magnet to the carry-out conveyor to carry out the cut flat steel. The carry-in stage, the cutting stage, and the carry-out stage are provided with a plurality of flat bar detection sensors for detecting the presence or absence of flat bar, and various conveyors in the respective stages according to detection signals from these flat bar detection sensors, The flat steel NC cutting line according to claim 1, 2 or 3 , further comprising control means for controlling operations of various devices such as a transport carriage, an NC cutting machine, and a picking crane.

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